Estimation of Pre-Compression Parameters in the Acceleration of Consolidation Settlement
American Journal of Civil Engineering
Volume 2, Issue 3, May 2014, Pages: 68-73
Accepted: Apr. 28, 2014;
Published: May 10, 2014
Views 3363 Downloads 277
Yaw Adubofour Tuffour, Department of Civil Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
Mark Adom-Asamoah, Department of Civil Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
Pre-compression by preloading is used to accelerate the consolidation settlement of a site ahead of construction so that post-construction settlement would be minimal. The principal aim of the technique is to remove the primary consolidation settlement anticipated under the proposed load with or without partial compensation for secondary compression so that post-construction settlement would consist of a small re-compression and secondary compression. In this paper, the scope of pre-compression is expanded to include partial removal of primary consolidation as a possible settlement management option. Modifications and simplifications are introduced into parameter estimation for design to deal with pre-compressions intended to remove any degree of the primary consolidation and those that go beyond the primary consolidation stage. This provides foundation engineers the flexibility to evaluate different pre-compression load and duration options under different settlement regimes and their implications. A numerical example is used to demonstrate and verify the modifications.
Yaw Adubofour Tuffour,
Estimation of Pre-Compression Parameters in the Acceleration of Consolidation Settlement, American Journal of Civil Engineering.
Vol. 2, No. 3,
2014, pp. 68-73.
J. A. Knapett, and R. F. Craig, Craig’s Soil Mechanics, 8th ed., Spon Press, New York, 2012.
J. Chu, M. W. Bo, and V. Choa, “Practical considerations for using vertical drains in soil improvement,” Geotextiles and Geomembranes 22, 2004, pp. 101-117.
A. K. Bhattacharya, and S. Basack, “A review of the use of preloading technique and vertical sand drains for soil consolidation,” Proc. Indian Geotechnical Conference, Kochi, December 2011, pp. 15-17.
S. J. Johnson, “Precompression for improving foundation soils,” Journal of Soil Mechanics and Foundation Division, ASCE, vol. 96, No. SM1, 1970, pp. 114-144.
J. D. Brown, and W. G. Paterson, “Failure of an oil storage tank founded on sensitive marine clay,” Canadian Geotechnical Journal, Vol. 1, No. 4, November 1964.
R. D. Darragh, “Controlled water tests to preload tank foundations,” Journal of Soil Mechanics and Foundations Division, ASCE, Vol. 90, No. SM5. September, 1964.
M. Kamiolkowski, R. Lancellotta, and W. Wolski, “Precompression and speeding up consolidation,” General Report, Proc. 8th European Conf. Soil Mech. & Foundation Engrg., Vol. 3, 1983, pp. 1201-1226.
E. C. Loeng, R. A. A. Soemitro, and H. Rhardjo, “Soil improvement by surcharge and vacuum preloading,” Geotechnique, Vol. 50, No. 5, 2000, pp. 601-605.
G. Mesri, M. A. Ajlouni, T. W. Feng, and D. O. K. Lo, “Surcharging of soft ground to reduce secondary settlement,” Proc. 3rd Int. Conf. on Soft Soil Engineering, Hong Kong, December 2001, pp. 55-65.
M. MacVay, and D. Nugyen, “Evaluation of embankment distress at Sander’s Creed-SR20,” Report submitted to the Florida Department of Transportation, UF Contract No. 4910-4504-734, May 2004.
B. M. Das, Principles of Foundation Engineering, 7th ed., Cengage Learning Engineering, 2010.